Ply multiplication apparatus

The utility model provides a ply multiplying assembly for the small-sized medical freeze dryer, comprising a compensating ply, a first connector, a second connector the length of which is half of the first connector and a plurality of ply. The plurality of ply and the compensating ply are connected as the following mode: the compensating ply and the first ply are connected with each other by passing through the second connector in parallel. The distant space between the compensating ply and the first ply is equal to the length of the second connector. The compensating ply and the second ply are connected with each other by passing through the first connector in parallel. The distant space between the compensating ply and the second ply is equal to the length of the first connector. The second ply and the first ply are located on the same side of the compensating ply. The first ply and the third ply are connected with each other by passing the first connector in parallel. The distant space between the first pl